Answer: A) Better not.
Explanation for this question is being written.
Answer: D) Or
Answer: C) To start.
Answer: A) CORRECT(suggests something should already be done).
Answer: A) You ought to make up your mind now.
Answer: B) Made
Answer: A) It should have been done sooner or a long time ago.
Answer: A) You might want to consider changing your password.
Answer: B) You'd better leave.
Answer: B) Came
Answer: B) It's better to.
Answer: C) Protect
Answer: D) Went